Jiang Qisu is Feng Yichen's friend and lifelong enemy, but he is also his master.
Then this apprentice deceived his master and destroyed his ancestors.
Then Jiang Qisu defeated this apprentice.
In the end, Jiang Qisu cut out his heart and made an elixir, but unexpectedly the elixir brought him back to the past, giving him a chance to choose, and also giving Feng Yichen a chance.
Intention: Believe in the light